1 Select the true statement about efforts to address water pollution in the United States. The Clean Water Act of 1972 stated that all U.S. waterways would be clean by 1983. The Refuse Act of 1899 was designed to protect waterways from non-point source pollution. Media coverage of water pollution issues in the 1960s led to public concern and political action. Individual states address non-point pollution sources by fining citizens for violations. CONCEPT Efforts to Address Water Pollution in the United States 2 Choose the statement that is NOT true about water availability on Earth. Industry uses nearly as much water as agriculture does. 20% of the world’s population lives in an area where water is scarce. Many major aquifers have a notable reduction in available water. More than a billion people do not have ready access to clean water. CONCEPT Water Availability 3 Which of the following is an example of an organic agricultural practice? Eliza adds earthworms to her garden to stimulate the formation of topsoil. Sadie and her family practice no-till farming. Rick alternates between grazing his livestock in several different pastures and giving them processed feed. Bill uses only natural fertilizers and pesticides. CONCEPT Agriculture Impacts 4 Which of the examples below describes an effort to address urban sprawl through brownfield repair? The site of a bankrupt cement factory is cleared and all hazardous substances disposed of. Walking trails are built to connect neighborhoods with popular restaurants and shopping centers. Private owners board up an abandoned building. A flower garden is maintained in a empty lot downtown. CONCEPT Addressing Urban Sprawl 5 Which statement about agroecosystems is false?
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Disrupted natural ecosystems lead to an increase in biodiversity. Burning trees to clear land releases carbon dioxide, which increases global temperatures.
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